internal static int NpyArray_RegisterCanCast(NpyArray_Descr descr, NPY_TYPES totype, NPY_SCALARKIND scalar)
{
if (scalar == NPY_SCALARKIND.NPY_NOSCALAR)
{
/*
* register with cancastto
* These lists won't be freed once created
* -- they become part of the data-type
*/
if (descr.f.cancastto == null)
{
descr.f.cancastto = new List <NPY_TYPES>();
descr.f.cancastto.Add(NPY_TYPES.NPY_NOTYPE);
}
descr.f.cancastto.Add(totype);
}
else
{
/* register with cancastscalarkindto */
if (descr.f.cancastscalarkindto == null)
{
descr.f.cancastscalarkindto = new Dictionary <NPY_SCALARKIND, object>();
for (int i = 0; i < npy_defs.NPY_NSCALARKINDS; i++)
{
descr.f.cancastscalarkindto.Add((NPY_SCALARKIND)i, null);
}
}
descr.f.cancastscalarkindto[scalar] = totype;
}
return(0);
}
internal static int NpyArray_RegisterCanCast(NpyArray_Descr descr, NPY_TYPES totype, NPY_SCALARKIND scalar)
{
return(numpyinternal.NpyArray_RegisterCanCast(descr, totype, scalar));
}
internal static bool NpyArray_CanCoerceScalar(NPY_TYPES thistype, NPY_TYPES neededtype, NPY_SCALARKIND scalar)
{
NpyArray_Descr from;
object castlist;
if (scalar == NPY_SCALARKIND.NPY_NOSCALAR)
{
return(NpyArray_CanCastSafely(thistype, neededtype));
}
from = NpyArray_DescrFromType(thistype);
if (from.f.cancastscalarkindto != null)
{
castlist = from.f.cancastscalarkindto[scalar];
if (castlist != null)
{
NPY_TYPES casttype = (NPY_TYPES)castlist;
while (casttype != NPY_TYPES.NPY_NOTYPE)
{
if (casttype++ == neededtype)
{
Npy_DECREF(from);
return(true);
}
}
}
}
Npy_DECREF(from);
switch (scalar)
{
case NPY_SCALARKIND.NPY_BOOL_SCALAR:
case NPY_SCALARKIND.NPY_OBJECT_SCALAR:
return(NpyArray_CanCastSafely(thistype, neededtype));
default:
if (NpyTypeNum_ISUSERDEF(neededtype))
{
return(false);
}
switch (scalar)
{
case NPY_SCALARKIND.NPY_INTPOS_SCALAR:
return(neededtype >= NPY_TYPES.NPY_BYTE);
case NPY_SCALARKIND.NPY_INTNEG_SCALAR:
return((neededtype >= NPY_TYPES.NPY_BYTE) && !(NpyTypeNum_ISUNSIGNED(neededtype)));
case NPY_SCALARKIND.NPY_FLOAT_SCALAR:
return(neededtype >= NPY_TYPES.NPY_FLOAT);
case NPY_SCALARKIND.NPY_COMPLEX_SCALAR:
return(neededtype >= NPY_TYPES.NPY_COMPLEX);
default:
/* should never get here... */
return(true);
}
}
}
internal static bool NpyArray_CanCoerceScalar(NPY_TYPES thistype, NPY_TYPES neededtype, NPY_SCALARKIND scalar)
{
return(numpyinternal.NpyArray_CanCoerceScalar(thistype, neededtype, scalar));
}
